3Tvwo Ch 8/10 Test yourself or Extra exercises

Today's content:
Ch8 or Ch10:
+ Test yourself: choose 4 exercises
+ Test yourself: choose 5 exercises

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Slide 1: Diapositive
WiskundeMiddelbare schoolvwoLeerjaar 3

Cette leçon contient 32 diapositives, avec quiz interactifs et diapositives de texte.

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Today's content:
Ch8 or Ch10:
+ Test yourself: choose 4 exercises
+ Test yourself: choose 5 exercises

Slide 1 - Diapositive

Math B pupils,
Yesterday you followed a long explanation about exercise 38.
Today I just leave you to it, to do your Homework, so do:
p.118/119     4 exercises from Test Yourself, or
p.120/121    5 exercises from Extra exercises,
right now. Of course feel free to follow the coming slides too!

Slide 2 - Diapositive

Math A boys and girls,
Before you start doing the Homework, 
let's go through (a part of) exercise 38 first.
It is a typical MATH A task and contains a few 
tricky points!

Slide 3 - Diapositive

How?!
+ open your Textbook on p.31 and your
+ you'll need your calculator too!
+ Notebook, to work out a, b, c and d together
+ of course, if you have done so, already,
    just follow the slides, comparing to your own results. 
+ first you see the whole exercise; than part by part
+ several M.C. will follow; don't fool yourself and key in your own answer!

Slide 4 - Diapositive

Even if you'd hardly score a point,
by participating and really trying,
            you'll learn a lot!
esp. because a slide with an explanation of the answer follows,                  every time a question is answered!

Slide 5 - Diapositive

Slide 6 - Diapositive

Work out for yourself and key in in the next slide:
the MEDIAN.
Let's do this step by step:
1st key in the total number of cars.

Slide 7 - Diapositive

Number of cars:
a. 249                       b. 251
c. 252                      d. 250 
Fill in, in next slide!         

Slide 8 - Diapositive

Total number of cars: .....
A
249
B
251
C
252
D
250

Slide 9 - Quiz

2nd question:
Calculate the median!

Slide 10 - Diapositive

The median is...
a. 125                           b. 126
c. 7                    d.  6

Slide 11 - Diapositive

The median is: ..........
A
125
B
126
C
7
D
6

Slide 12 - Quiz

38a  explanation median:

Slide 13 - Diapositive

Slide 14 - Diapositive

3rd: calculate the lower and the upper quartiles!
Answers: next slide.

Slide 15 - Diapositive

38a Quartiles:
a. 3 and 9                 b. 4 and 8

c. 4 and 9                 d. 3 and 8

Slide 16 - Diapositive

Quartiles are:
A
3 and 9
B
4 and 8
C
4 and 9
D
3 and 8

Slide 17 - Quiz

38a explanation quartiles:

Slide 18 - Diapositive

With all the information we have now,
draw the BOX PLOT ! (= 38b)
What information??! Well:
+      median = 6
+      Q1 = 4 
+      Q3 = 8     Have a good try. In the next slide you see the              
        desired result.


Slide 19 - Diapositive

Slide 20 - Diapositive

Desired result:

Slide 21 - Diapositive

Time to key in the mode, 38c.

Slide 22 - Diapositive

the mode is ....
a. 39            b. 35
c. 8               d. 7 
Key in, in the next slide!

Slide 23 - Diapositive

The mode is: ....
A
39
B
35
C
8
D
7

Slide 24 - Quiz

Explanation 38c:
The MODE is the age class with the HIGHEST FREQUENCY.
So the MODE is 7 years, as 39 cars sold is clearly the
highest frequency.

Slide 25 - Diapositive

One more to go: 38d:

Slide 26 - Diapositive

The correct answer for 38d is ...
a. 65 %                                  b. 44 %
c. 56 %                                  d. 57 %
Key in, in next slide!

Slide 27 - Diapositive

38d The % of cars that has an age less than the mode is .... %
A
65 %
B
44 %
C
56 %
D
57 %

Slide 28 - Quiz

possible explanation:
1st way:   (the Solutionsbook is fond of ratio tables!):



2nd way (that I'd prefer):
140/250 x 100 % = 56 %

Slide 29 - Diapositive

Slide 30 - Diapositive

No matter how succesful you've been...
or how tired you are now...
more important is  
+ your activity and you
+ having learned a lot about Statistics!
+ thanks for trying hard and for your presence.

Slide 31 - Diapositive

Because this was a long task ...
you only have to choose:
4 exercises of Test yourself, p.36/37  or
5 exercises of Extra exercises, p.38/39
HOMEWORK TIME -  Bye for now!

Slide 32 - Diapositive